Inquiry (采购产品): Tungsten electrodes I am a college student at the Sirrea College in Rocklen Ca.I was given an asignment to write a paper on pure tungsten electrodes and am trying to find some history (how they are made,there chemical make up,which polarity settings is best for pure tungsten electrodes, what sizes do they come in etcra. I would appricate any help you may be able to offer on this matter, thank you. **** Hidden Message ***** Michael Diapoulis 95949-6669 Company: Student E-mail: michaeld@garlic.com **** Hidden Message ***** michaeld@garlic.com